Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 9d7dd89932a65caf…

MALICIOUS

Office (OLE) / .DOC

587.5 KB Created: 2020-05-04 13:09:18 Authoring application: Microsoft Excel
MD5: 4b3f376c2d107c0099895a999eec64c0 SHA-1: d8e172774c9fd3c55e79d5d0ecbb086a3a7ad61f SHA-256: 9d7dd89932a65caf83b3300043452b7f14b56ae7175cb526f1368ddf2b39d50e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059.001 PowerShell T1059.003 Windows Command Shell T1059.004 Python

The sample is an Excel document containing Excel 4.0 (XLM) macros, indicated by the OLE_XLM_AUTOOPEN and OLE_XLM_DANGEROUS_FN heuristics. The macros utilize ShellExecute and URLDownloadToFile APIs, suggesting they are designed to download and execute a second-stage payload from the embedded URLs. The presence of these APIs and the macro sheet structure strongly indicate a malicious intent to compromise the user's system.

Heuristics 5

  • Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD
    Reference to URLDownloadToFile API
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute API
  • XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://spdtextile.com/sport/rockstar.php
    • https://spdtextile.com/sport/
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/photoshop/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt
33c1890f25cb80a4b696a0ac96cf5bff2b8066340e38713922945c8c95a09735		 xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 48859 bytes

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